. >> meantime the research center released a poll today that shows 49% of likely voters now they they back romney while 45% say they support president obama. >>> today marks the first day the voters could vote by mail. for those already registered to vote by mail, election officials are expected to start sending out those ballots tomorrow after the columbus day holiday. if you haven't registered to vote the deadline to do so is october 22nd. >>> concerns tonight from election officials cy young voters are more likely to have their vote by mail ballots rejected than older voters. contra costa election steve says that's because their soinths their voter registration card often do not match the signature on the back of their mail-in ballot. >> that could mean an election is being lost because of that, and it break misheart to see the younger people that you're getting sievically engaged and you can't count their ballot. >> 20 to 39-year-olds in contra costa county make up to 15% of the voters but 50% of the signature rejection. >>> well, the president's arrival is not exactly welcomed by